Recoil-compensator.



I. J. MELLEN & B. A. EDWARDS.. REGOIL GOMPBNSATOB.

APPLICATION FILED NOV. 14, 1907.

PATEN'IZED AUG. 18,1908.

. I 314004145115 [11.776666611. By?! 'd'warqZ-s UNITED T TES PAr'rENT OFFICE. Y

FREDERICK J. MELLEN AND BURTON A. EDWARDS, or BELorr, WISCONSIN.

REGOIL-COMFENSATOR.

Specification pattern Patent. Application'fi led Nove1'nber.1'i=,.1 907. Serialllo. 402,217.

Patented Aug. 18, 1908.

To all whom it may concern:

-Be it known that we, FREDERICK J. MEL- LEN and BURTON A. EDWARDS, citizens of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Recoil-Compensators, of which the following is a specification.

This invention comprehends certain new and useful improvem nts in that class of devices that are designed to be interposed between the body and axle or springs of a vehicle in order to compensate for the rebounding action of the springs after they have been compressed, owing to the vehicle passing over uneven fplaces in the road, and our invention has or its object a simple, durable and eflicient construction of recoil compensator of this character which will be composed of comparatively few parts that may e cheaply manufactured and easily as sembled and that will not be liable to get out of order.

With these and other objects. in view as will more fully appear as the description proceeds, the invention consists in certain constructions, arrangements and combinations of the parts that we will hereinafter describe and then point out the novel features in the so ap ended claims.

ora full understanding of the invention reference is to be had to the following descri tion and accompanying drawings, in whic Figure 1 is a side elevationof our improved shock compensator showing it in applied position; Flg. 2 is a longitudinal sectional view thereof; Fig. 3 is a transverse sectional view; and, Fig. 4is a detail perspective view of the piston.

Corresponding and like parts are referred to in the followin descriptlon and indicated in all the views 0 the drawings by the same reference characters.

Our im roved recoil compensator comprises a cy inder 1 embod ing front and rear eads 2 and 3 secured to t e body portion by screw-bolts or any otherdesired means, said body portion being formed with base extensions 4 by which the cylinder may be secured bore 9 of the ho mobiles and other vehicles, it

of the chamber 6, the sides of said blocktapering towards the center ofthe chamber.

A piston 8, which, in the present instance,

is .in the form of a segmental block, as best seen in Fig. 4, is mounted to oscillate in the chamber 6 about the center of the chamber, as an axis, and said piston is for-med with a laterally projecting shaft extremity 9 extending out of the cylinder through a stuffing box 10, An arm 11 is secured at one end to the rotruding end of the shaft 9 of the piston 8, t e other end of said arm being connected by a link 12 or any other suitable means to some portion of the vehicle body.

The iston 8 is formed with a passage 13 extendlng therethrough from one side to the other so as to establish communication between the opposite sides ofthe chamber 6 as regards the said piston, it being understood that the piston is of a width to fit frictionally between the heads 2 and 3, and of a length and contour to snugly fit the Wall of the chamber 6. A check valve 14 is mounted within one end of the,passage 13 and is designed to close said passage, said check valve. being held yieldingly on its seat by means of a helical com 7 ression spring 15 secured to the check va ve and to a transverse pin 16 extending across the passage 13 and secured in the piston, as best seen in Fig. 3.

In addition to the passage 13, the piston 8 is formed with a Hort'17 which intercepts the CW shaft extension 9 of the piston, and a screw plug- 18 is mounted in said bore 9 and is designed to vary the area of the port 17, transversely considered, so as to regulate the size of the passage formed there y, in an evident manner.

In the practical operation of our im roved' recoil compensator for the sprin s 0 autobe understood that the com ression of the springs for sup orting the b0 y, that is, the tension un er which the springs are placed u on the downward movement of the body,'1s in no sense retarded, because the downward movement of the arm 11 will turn the piston Sin such a direction that the oil or other medium in the chamber 6 may unseat the valve 14 and flow freely through the passage 13 from .one side of the piston to the other. U onthe recoil movement, however, the chec valve 14 will effectively close the passage 13, and, owing to the partition 7, the oil or other flu'1d medium will e forced through the relatively small port 17 so that the flow of the fluid mev dium will be effectively retarded until equilibrium is restored. Hence, all of the unpleasant shock incident to the sudden recoil movement of the vehic e'body when traveling over an uneven road.

Having thus described the invention, what is claimed as new is:

1. A recoil compensator of the character described, com rising a cylinder forming a chamber for a uid medium, a solid partition secured in said chamber, a piston mounted to oscillate in said chamber, and formed with a assage extending therethrough, and a re ative y small port also extending therethrough, a s ring pressed check valve connected to sai iston and adapted to close said passage, t 0 piston being formed with a laterally rojectin shaft extension extending out of t e c linfer, said extension being formed with a ore intercepting said 7 port, an operating arm secured to said extension, and a plug mounted in said bore and adapted to vary the size of the port, as and for the purpose set forth 2. A recoil compensator comprising a cylinder, providing a chamber for a fluid medium, a partition secured in said chamber, a

iston mounted to slide in said chamber and ormed with a passa e extending therethrough,acheckvalve a apted to close against one end of said passage, a pin secured in the piston and extending transversely of saidpassage, a compression sprin connected to said pin and valve and adapte to yieldingly hold the valve against the end of the piston, said piston being formed with alaterally projecting shaft extension protruding from the cylinder, an operating arm secured to said shaft extension, said shaft extension being formed with a bore extending into the piston, the piston being formed with a port extending entirely therethrough and intercepting the inner end ofthe bore, and a plug working in the bore and adapted to vary the size of the port.

In testimony whereof we aflix our-signatures in presence of two witnesses.

FREDERICK J. MELLEN. [1,. 8.] BURTON A. EDWARDS. [L 51.]

- Witnesses:

MARY Van LANE, Tnos. R. HARPER. 

